Time gap for transmission

In these days I got a problem with a thread, which began in the late evening, was transferred to google at midnight and deleted in the early morning. This thread is still listed in google.
Why not wait 1 or 2 days before threads are transferred in the sitemap?

Ops.
If this is something common you might want to add a "nocache" meta-tag in your SHOWTHREAD template, that way even if google "indexes" the thread, it would never get into google's cache

And the difference between Google-Index and Google-Cache is?

Is it possible that the thread one day isn't listed and on the next day it is?
Is this possible because there are many servers that don't delete/create at the same time?

the index is, after a search, the url appears that goes to your site.

the cache is, after a search, below your url appears a "cache" option, and you can see the last version of the page that google saw. Even if your page is down (or if you deleted the page), the user can see the page from google's servers.

Yes, it is possible that one day isn't listed and the next day is and the next day isn't. Usually it's not that fast.

Not only because of the many servers, but also due to to the dynamic nature of search engines.

You should want all of your content to get indexed as quick as possible. Content that ends up getting deleted should account for a very low percentage of what gets included in your sitemap, and it will not be included the next time it runs.

Thanks to both of you!